GoldenMotor.com Forum

problem it that it peaks at 90 dB.
I built the outboard last year, and used it last summer, despite the noise.
Just as noisy in operation with the prop installed and pushing our pontoon boat.

Decided it needed to get fixed somehow otherwise it is pretty useless.
Mentioning your motor is much quieter helps, at least affirms there is something unusual with mine.
I have wondered if I got the phasing wrong by mis wiring whether that would cause a high motor noise.
Not something I want to experiment with, thought, without some certainty it might be the issue.
The increase in noise at about 4000 rpm is concerning, because that is well within the motors limits.

sound file attached, running with no load, from zero to about 4500 RPM

The motor is running by itself - water pump off, gearbox disconnected.

With my stethoscope, it sound like the noise is coming from the upper area of the motor ( opposite the output shaft.
Unless there is some way that mis wiring would cause such a noise, I think I'll have to pull apart the motor and check the bearings.
Its out of warranty.

Wonder if anyone has an exploded view of the motor.

I need help again.   I've given up on the curtis ET-134 and will be using a 10KOhm Potentiometer and some switches and I have a couple (More) questions.

Is there a configuration of the throttle wires (black/white), (green/white) and (red/white) that can be managed by an ON (Green light)-OFF-ON (Red Light) lighted switch such that the OFF position does not send signal regardless of the potentiometer resistance?
Pinout:
   1 Green light on
   2 Common (+ve)
   3 Red light on
   4 Negative

For the above configuration, how can the can the Red light on position enable the reverse (brown and black) switch to throw the motor in reverse?

For reference my Parts list is
- elock: https://www.bluesea.com/products/2155/SPDT_Remote_Control_Contura_Switch_-_ON-ON
- potentiometer/Throttle: https://www.digikey.ca/en/products/detail/te-connectivity-passive-product/3-1625931-1/2363861?s=N4IgTCBcDaIIIEYAMBWA7GNBaAcgEQAIQBdAXyA
-rocker switch: https://www.digikey.ca/en/products/detail/cw-industries/GRB260D501BBRG1/2349704?s=N4IgTCBcDaIMIHUCMYAsBaAcgERAXQF8g

Does anyone read these wanted/for sale posts?
The last "WANTED" ad was almost two years ago.
I'll pay twice the price for a working thumb throttle.

I have a 5kw water cooled 48V motor with a VEC300 controller, connected to a 14 cell LFP battery, powering a converted 9.9 Evinrude outboard.
It works fine but it is really noisy.
3-4 feet away, under no load, with the engine cover off, I measure up to 90 dB.
This is with the motor disconnected from the outboard motor gearbox.

Is this noise level unusual?

Is it possible for a mistake in the wiring to cause excessive motor noise?

IThe noise drops about 10dB when I put on the heavily insulated engine cover, but even 80 dB is much noisier than I would expect.

Any thoughts or suggestions will be appreciated.